package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.Set;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
  @Autowired private DishService dishService;

  @Autowired
  private RedisTemplate redisTemplate;

  /**
   * 根据分类id查询菜品
   *
   * @param categoryId
   * @return
   */
  @GetMapping("/list")
  @ApiOperation("根据分类id查询菜品")
  public Result<List<DishVO>> list(Long categoryId) {

    // 构造redis中的key，规则：dish_分类id
    String key = "dish_" + categoryId;
    // 查询redis中是否存在菜品数据
    List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
    // 如果存在，直接返回，无须查询数据库
    if (list!=null &&list.size()>0){
      return Result.success(list);
    }
    Dish dish = new Dish();
    dish.setCategoryId(categoryId);
    dish.setStatus(StatusConstant.ENABLE); // 查询起售中的菜品

    // 如果不存在，查询数据库，将查询到的数据放入redis中
    list = dishService.listWithFlavor(dish);
    redisTemplate.opsForValue().set(key,list);

    return Result.success(list);
  }


}
